Human language capabilities are based on mental proceduresthat are closely linked to the time domain. Listening, understanding, and reacting, on the one hand, as well as planning, formulating, and speaking, onthe other, are performedin a highlyover lapping manner, thus allowing inter human communication to proceed in a smooth and ?uent way. Although it happens to be the natural mode of human language interaction, in cremental processing is still far from becoming a common feature of today's lan guage technology. Instead, it will certainly remain one of the big challenges for research...